Knee pad



FIG. 1 is a perspective view of a knee pad showing my new design;

FIG. 2 is an enlarged frontal view thereof;

FIG. 3 is an enlarged top plan view thereof;

FIG. 4 is an enlarged rear plan view thereof;

FIG. 5 is an enlarged side elevational view thereof; and,

FIG. 6 is an enlarged bottom plan view thereof. 

The ornamental design for a knee pad, as shown and described. 